B7 - A. carotis externa

Question 1

Where does a. carotis externa arise?

(Location in body, and from which vessel)

Answer 1

A. carotis communis divides into a. carotis interna and a. carotis externa ventral to ala atlantis

Question 2

Draw a. carotis communis in the dog

Answer 2

Question 3

Draw a. carotis communis in the horse

Answer 3

Question 4

Draw a. carotis communis in the swine

Answer 4

Question 5

Draw a. carotis communis in the ruminant

Answer 5

Question 6

Draw a. carotis externa in the dog

Answer 6

Question 7

Draw a. carotis externa ​in the horse

Answer 7

Question 8

Draw a. carotis externa ​in the swine

Answer 8

Question 9

Draw a. carotis externa ​in the ruminant

Answer 9

Question 10

Draw the arterial blood supply of the head in the dog

Answer 10

Question 11

Interspecies differences

Answer 11

From the main stem of a. carotis externa:

• A. occipitalis (ca, eq??????)
• Tr. linguofacialis (bo, eq)​​
  
  • ​A. palatina ascendens ex tr. linguofacialis (eq)
  • A. lingualis ex tr. linguofacialis (bo, eq)
  • A. facialis ex tr. linguofacialis (bo, eq)
• A. lingualis ex a. carotis externa (ca, su)
• A. facialis ex a. carotis externa (ca, su)
• A. parotidea (ca), several rr. parotidei (su)
• R. massetericus (eq, bo)

A. lingualis

• A. linguae profunda
  
  • Rr. glandulares (ru) → gl. mandibularis
• A. sublingualis (ru, su)

A. sublingualis

• Ru, su: ex a. lingualis
• Eq, ca: ex a. submentalis

A. palatina ascendens:

• Ca, su: ex a. lingualis
• Ru: ex a. occipitalis
• Eq: ex tr. linguofacialis

A. facialis (ø small ru)

• Ca, su: ex a. carotis externa
• Bo, eq: ex tr. linguofacialis
• On the surface of the face it gives rise to:
  
  • A. labialis inferior (ø su: ex a. buccalis)
  • A. labialis superior (ø su: ex a. buccalis)
  • A. angularis oris (ca) (eq: ex a. labialis inferior, su: ex a. buccalis)
  • A. lateralis nasi rostralis (bo) = a. lateralis nasi (eq)
  • A. dorsalis nasi (eq) (ca: ex a. infraorbitalis, su, ru: ex a. malares)
  • A. angularis oculi (ø su: ex a. buccalis)

A. temporalis superficialis:

• R. articularis temporomandibularis (ru, sus: ex a. transversa faciei)
• A. cornualis (horned ru)
• R. lacrimalis (su, ru)
• Car, ru: divides into:
  
  • A. palpebralis superior lateralis
  • A. palpebralis inferior lateralis
    
    • ​A. dorsalis nasi (car ex a. palpebralis inferior lateralis)